Base Class: Ranger
With the dino-master archtype it allows one to have close friendship with the ancient dinosaurs. You work together well with boosting dinosaurs power as well as work in combat well with these ancient beasts. Commiting to this archtype means you will have a close friendship forever with dinosaurs.
Dinosaur Companion
At level 3 you gain a dinosaur companion. This must be challange rating 1/4 or lower and cannot be larger then medium in size. Add your proficiency bonus to the beast's AC, attack rolls, and damage rolls, as well as to any saving throws and skills it is proficient in. Its hit point maximum equals its normal maximum or four times your ranger level, whichever is higher. Like any creature, the beast can spend Hit Dice during a short rest. You can use your verbal action to command the actions this beast does and if you are incapacitated or are not with the dinosaur it acts on its own terms. If this creature is killed you can spend 8 hours to magically recreate the dinosaur. If you do this you may also choose for it to be a different dinosaur then originally picked.
Empowering Magic
Starting at 3rd level you learn an additional spell when you reach certain levels in this class. This counts as a ranger spell for you but doesn't count against known spells. At 5th, 9th, 13th, & 17th level you also gain a spell.
3rd: Dino Smite
5th: Enlarge/Reduce
9th:Haste
13th: fire shield
17th: Skill empowerment
Shared Magic
Starting at level 3 you gain the ability to cast spells that normally can only be cast on self as touch spells on your dinosaur companion as well as cast spells through the dinosaur companion although it uses your action(or bonus action) to do so.
Dinosaur Companions
Starting at level 7 you gain an additional dinosaur companion that is CR 1/4 or lower and cannot be larger then medium. This acts in the same way as the level 3 dinosaur companion
Combat-built dinos
If the dinosaur companion(s) selected do not have a multiattack they gain the ability to do so. If they already have multiattack they gain one additional attack.
Dino prowress
At 15th level you gain the ability to greatly increase your own and your dinosaurs strength when near. When within 30 feet of your dinosaur companion(s) you have advantage on stealth & perception checks. You also gain the ability once per long rest to summon either 8 cr 1/4 dinosaurs or 1 cr 2 dinosaur that act as a dinosaur companion for the time they are summoned. They stay for 1 hour or until their hit points reach 0.